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Topic: Enceladus (moon)

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  Saturn's Moon Enceladus
It is postulated that Enceladus is heated by a tidal mechanism similar to Jupiter's moon Io.
Enceladus is one of the coldest places in the Saturn system because its extremely bright surface reflects 80 percent of the sunlight that hits it, so only 20 percent is available to heat the surface.
The relatively dense accumulation of impact craters implies that this terrain is among the oldest on the moon's surface.
www.solarviews.com /eng/enceladu.htm   (4914 words)

 Enceladus (moon) - Wikipedia, the free encyclopedia
Enceladus was discovered by Fredrick William Herschel on August 28, 1789, during the first use of his new 1.2-meter telescope, then the largest in the world.
Enceladus orbits Saturn at a distance of 238,000 km from the planet's center and 180,000 km from its surface, between the orbits of Mimas and Tethys, requiring 32.9 hours to revolve once (fast enough for its motion to be observed over a single night of observation).
Moreover, since Enceladus rotates synchronously with its orbital period and therefore keeps one face pointed toward Saturn, the planet never moves in Enceladus' sky (albeit with slight variations coming from the orbit's eccentricity), and cannot be seen from the far side of the satellite.
en.wikipedia.org /wiki/Enceladus_(moon)   (5708 words)

 Enceladus (mythology) - Wikipedia, the free encyclopedia
In Greek mythology, Enceladus was one of the Gigantes, the enormous children of Gaia (Earth).
During the battle between the Gigantes and the Olympian gods, Enceladus was disabled by a spear thrown by the goddess Athena.
Enceladus, a moon of Saturn, is named after the mythological Enceladus.
en.wikipedia.org /wiki/Enceladus_(mythology)   (191 words)

 Enceladus   (Site not responding. Last check: 2007-11-07)
Enceladus is much too small to be heated by the decay of radioactive material in its interior at present (the heat would have all dissipated long ago).
Enceladus is locked in a 1:2 resonance with Dione (similar to the situation between Io and Europa).
Enceladus may be the source of the material in Saturn's tenuous E ring.
seds.lpl.arizona.edu /nineplanets/nineplanets/enceladus.html   (292 words)

 Enceladus (moon)
The name "Enceladus" and the names of all seven satellites of Saturn then known were suggested by Herschel's son John Herschel in his 1847 publication Results of Astronomical Observations made at the Cape of Good Hope ([10]).
Enceladus is locked in a 2:1 orbital resonance with Dione, similar to the situation between Io and Europa, and this may provide a tidal heating mechanism; however it is probably insufficient to melt water ice.
Enceladus was confirmed in July, 2005 by a Cassini Spacecraft flyby as the major source of the material in Saturn's tenuous E Ring.
www.mlahanas.de /Greeks/Astro/Enceladus.html   (3076 words)

 Enceladus (moon) - Encyklopedia   (Site not responding. Last check: 2007-11-07)
Enceladus (en-sel'-ə-dəs, IPA /ɛnˈsɛl ə dəs/, Greek Εγκέλαδος) is the sixth-largest moon of Saturn, discovered in 1789 by William Herschel [10].
Outgassing near the south pole, the youthful age of the surface, and the presence of escaping internal heat indicate that Enceladus, and the south polar region in particular, is geologically active today.
Following the Voyager encounters with Enceladus in the early 1980s, scientists postulated that the moon may be cryovolcanically active based on its relatively youthful surface, location near the core of the E ring, and high albedo—significantly higher than that of any other mid-sized icy Saturnian satellite.
en.science24.org /w,Enceladus_(moon)   (3764 words)

 BBC - Science & Nature - Space - Enceladus
Enceladus is continually squeezed by the changing gravitational fields of Saturn and its nearby moons.
Enceladus may be the source of the material in one of the rings of Saturn.
Enceladus is not visible from the Earth with the naked eye, but can be seen with a telescope.
www.bbc.co.uk /science/space/solarsystem/saturn/enceladus.shtml   (424 words)

 Ice volcanoes on Saturn's moon Enceladus
The icy moon Enceladus was, however, expected to feed the ring with significantly larger pieces.
On July 14, 2005, the CASSINI space probe came within 175 kilometres of Enceladus, which is suspected of being the source of Saturn's E Ring.
Enceladus is thus the second moon in our solar system where volcanic activity has been discovered.
www.eurekalert.org /pub_releases/2006-03/m-ivo031406.php   (574 words)

 Sea and Sky's Tour of the Solar System: Enceladus
Enceladus was named after a Greek Titan who rebelled against the gods and who was later defeated in battle by Aphrodite and buried under Mount Etna.
Enceladus was discovered in 1789 by the British astronomer, Sir William Herschel.
Enceladus is perturbed in its orbit by the gravitational fields of Saturn and its neighboring moon, Tethys and Dione.
www.seasky.org /solarsystem/sky3g3.html   (309 words)

 Universe Today - Cassini Finds Active Ice on Enceladus
The moon is relatively close to Saturn, so the intense tidal pressures are keeping it warmer than it should be.
Saturn's tiny icy moon Enceladus, which ought to be cold and dead, instead displays evidence for active ice volcanism.
The fact that the atmosphere persists on this low-gravity world, instead of instantly escaping into space, suggests the moon is geologically active enough to replenish the water vapor at a slow, continuous rate.
universetoday.com /am/publish/active_watery_world_at_enceladus.html?...   (776 words)

 BBC NEWS | Science/Nature | Cassini lines up close moon flyby
The atmosphere, composed of ionised water vapour, was detected by the orbiter's magnetometer instrument during flybys in February and March.
Enceladus measures some 500km (310 miles) in diameter and is described as the most reflective object in the Solar System, throwing back about 90% of the sunlight that hits it.
Likewise, with the atmosphere, Enceladus does not possess the gravitational attraction necessary to hold on to a cloud of water ions, so this must be being replenished also.
news.bbc.co.uk /1/hi/sci/tech/4676069.stm   (528 words)

 ScienceDaily: Cassini Finds An Atmosphere On Saturn's Moon Enceladus   (Site not responding. Last check: 2007-11-07)
Since the Voyager flyby, scientists have suspected that this moon is geologically active and is the source of Saturn's icy E ring.
Enceladus is the most reflective object in the solar system, reflecting about 90 percent of the sunlight that hits it.
Tiny Enceladus May Hold Ingredients Of Life (September 8, 2005) -- Saturn's tiny moon Enceladus is "absolutely a highlight" of the Cassini mission and should be targeted in future searches for life, Robert H. Brown of The University of Arizona, leader of the Cassini...
www.sciencedaily.com /releases/2005/03/050322133345.htm   (1727 words)

 Saturn moon Enceladus
Enceladus measures 310 miles in diameter and reflects nearly 100 percent of the light that hits its ice-covered surface.
It is possible, the scientists say, that gravitational interactions between Enceladus and another moon of Saturn have triggered some form of water volcanism.
Enceladus orbits Saturn at a distance of approximately 147,500 miles, almost two-thirds the distance from Earth to the moon.
www.theallineed.com /science/05051001.htm   (682 words)

The moon's South Pole is towards the left side of the picture.
Enceladus was discovered in 1789 by William Herschel (who also discovered the planet Uranus).
The moon is small and doesn't have very strong gravity.
www.windows.ucar.edu /tour/link=/saturn/moons/enceladus.html   (398 words)

 Cassini measures geisers of Saturn's moon Enceladus
Enceladus is a small moon, but highly reflective due to the fresh layer of snow and ice on its surface.
In addition to constantly refreshing the snowy moon's surface, the geisers also appear to be supplying oxygen atoms to the planet's E ring.
The magnetosphere itself deflects in the vicinity of Enceladus, and we measure the plasma and that deflection.
www.eurekalert.org /pub_releases/2006-03/danl-cmg031006.php   (481 words)

 APOD: 2002 January 24 - Ski Enceladus   (Site not responding. Last check: 2007-11-07)
Enceladus shows a variety of surface features and very few impact craters - indicating that it is an active world even though this ice moon should have completely cooled off
ring of Saturn, the moon's surface may be kept snow-bright as it is continuously bombarded with icy ring particles.
Eruptions on Enceladus itself would in turn supply material to the E ring.
antwrp.gsfc.nasa.gov /apod/ap020124.html   (175 words)

 Enceladus: A Moon with a Past
This means that Enceladus has been geologically active relatively recently, especially compared to some of its neighbors in the Saturn system.
There is an impressive variety of fractures visible here--from the wide east-west rifts near the upper left of the mosaic to the very fine north-south fractures in the center (which are approximately 100 to 400 meters, or 330 to 1,300 feet, across).
Due to the complexity of this terrain, the task of unraveling Enceladus' history promises to be a worthy challenge for planetary scientists.
www.solarviews.com /cap/pia/PIA06206.htm   (251 words)

 Enceladus   (Site not responding. Last check: 2007-11-07)
Enceladus is the eighth of Saturn's known satellites:
Enceladus is much too small to still be heated by the decay of radioactive material in its interior (the heat would have all dissipated long ago).
Enceladus, moon of Saturn, close and chopped off 204k gif
societies.csc.tcd.ie /~tass/tnp/nineplanets/enceladus.html   (302 words)

 'Hot spot' found Saturn moon. 31/08/2005. ABC News Online
It is located at the south pole of Enceladus, a moon with a diameter of just 500km which orbits Saturn at a distance of about 238,000km.
Usually, the hottest part of any planet or moon is around the equator, as is the case with the earth.
This suggests that the heat at Enceladus' southern pole is generated from within, scientists from the Cassini-Huygens mission to Saturn and its moons said.
www.abc.net.au /news/newsitems/200508/s1449891.htm   (500 words)

 Re: Swapping Enceladus with our Moon
Enceladus is the most reflective object in the Solar System with a reflectivity of 0.99 (meaning 99% of the light that reaches its surface is reflected).
For a given surface area, Enceladus would appear to be ~8.25 times brighter than the same- sized patch of the Moon at the same distance from the Earth.
The ratio of the surface area of Enceladus to the surface area of the Moon is ~0.02, so the area of Enceladus is ~2% that of the Moon.
www.madsci.org /posts/archives/2004-08/1091988015.As.r.html   (260 words)

 Water on Saturn moon could support life - Space News - MSNBC.com   (Site not responding. Last check: 2007-11-07)
An enhanced-color image of Enceladus, based on data from the Cassini spacecraft, highlights dark "tiger stripes" in the south polar region.
Scientists have found evidence that cold, Yellowstone-like geysers of water are issuing from a moon of Saturn called Enceladus, apparently fueled by liquid reservoirs that may lie just tens of yards beneath the moon's icy surface.
Some of the ice escaped Enceladus' gravity field to become part of a wide, thin ring of Saturn known as the E ring.
www.msnbc.msn.com /id/11736311   (920 words)

 Enceladus Erupting :: Astrobiology Magazine ::
Summary (Dec 07, 2005): Jets of fine, icy particles streaming from Saturn's moon Enceladus were captured in recent images from NASA's Cassini spacecraft.
Jets of fine, icy particles streaming from Saturn's moon Enceladus were captured in recent images from NASA's Cassini spacecraft.
"Only, in the case of Enceladus, the energy source for the geyser-like activity is believed to be due to internal heating by perhaps radioactivity and tides rather than the sunlight which causes cometary jets." The new data also give yet another indication of how Enceladus keeps supplying material to Saturn's gossamer E ring.
www.astrobio.net /news/article1797.html   (570 words)

 Saturn's Watery Moon - - science news articles online technology magazine articles Saturn's Watery Moon   (Site not responding. Last check: 2007-11-07)
To understand this improbable water fountain in space and whether we should expect life to be teeming beneath, we spoke with John Spencer, an expert on the moons of giant planets who is part of the Cassini team, working at the Southwest Research Institute in Boulder, Colorado.
We knew Enceladus was strange ever since Voyager flew past in the early 1980s.
We see evidence in many worlds in the outer solar system for ice vulcanism, if you want to call it that, where you have a surface that is mostly ice and there seem to be eruptions and disturbances and fracturing of the surface.
www.discover.com /web-exclusives/saturns-moon   (1470 words)

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